Improvement in devices for preventing the



y G. E. VALN. Device im" Preventing he ESG-ape of SeWe-Gris fram Basin @vafowsi A UNITED STATES PATENT and I do' hereby declarethat the following is the openings in wash-basins and other houseformed of india-rubber preferably, leather, or

f/ITO all whom it may concern:

- State of Maryland, have invented certain new CHARLES n. Dn vALrN, or' BALTIMORE, MARYLAND.

IMPROVEMENT iN DEVICES' FOR PREVENTI'NG THE,

ESCAPE 0F SEWER-GAS FROM BliSlN-Ol'lil'lFLOWS.v

Specification formingp'art of Letters Patent No. 213.977, dated April S, 1879; application filed April 9, 1ers.

Beit known that I, CHAnLEs E. DE VALIN, of Baltimore, in the county of Baltimore and and useful Improvements in Vent-01osers`;

a full, clear, and exact description of the invention', which will enable others skilled in the art to lwhich it alape'rtains to make and use the same, reference being had to the aecompanying drawings, and to letters of reference niarkedthereon,which forni a part of this speci fication. v

My invention relates to. a device for closing hold furniture used in sanitary construction throughwhich there ,is a liabilityof an escape of gas,deleterious to health. It is to be used more particularly to cover the openings provided for the overflow in permanent washbasins and sinks.

, It consists-of a hollow cup-shaped cap,

other elastic material, the base of which will conform to the surface against which itis intended tol rest.

In connection with the cap mentioned is a hook, the shank of, which Aisl securely fastened to the top to said. cap. The. object oi said hook is to anchor said cap to the hars or spaces between the-'openings onr perforations at the mouth of the overliow-pipe.

In the accompanying drawings, Figure l isa sectional view, showing the application of the device in one form to the overiloW-'openings of a permanent wash hasin. Fig. 2 is an enlarged view of the cap of a slightly-difterent form. Fig. 3 is a section of a cap having the lbase of tubular form.

Similar reference-letters denotey like parts in all ofthe gnres.

A is a 'section of a wash-basin with perforations near its upper edge, which open into the overflow-pipe B. C is the cap, fastened to one of the spaces between two' of the `perforated openings in the side of the wash-basin.

In Fig. 2, u is the crowrrot' the cap, which is in the form of a disk, vwith a hold, b,"which answers the purpose of a handle.

C is .the rim of the cap, which is provided with an' enlargement at the base d, said base having an even or smooth surface to'form a perfect joint when bearing against the concave surface of the basin.

In the crown of the cap is secured, by any suitable means, the hook c. This hook may be of any required length, and its bend to be fashioned to suit the substance to which it is to be fastened.

In securing the cap 'to prevent the escape ot' gas fromthe sewer I take it in hand, with the hook downward, and press it lfirmly against the surface of the bowl or basin until the hook finds one of the openings. The cap being ot' elastic material, when the pressure is removed it will return toward its natural position or shape, and the hook will take hold of the surface with which it comes in contact ou the re turn of the cap and press the base of the cap, bearing hard against th-e surface of the basin to form an air-tight joint to prevent the escape of gas, Sto. v

In 3 I have shown another form oi' cap, with a tubular base, the crown being formed of a separate piece, which may be of hard material, ii preferred.

I have several other forms ot' caps, and among them one of hemispherical form, with a disk of hard material to form the crown, to which may be fastened the hook described, and another vin which is the simple dish ot' elastic material, with the hook, with or with out the rims.

I do not wish, however, to he confined to any particular form of cap, as any cup or oapshaped ligure composed entirely or in part of elastic material, in combination with the hook, could he used io the desired cud.

What I claim as my invention, and desire to secure by Letters Patent, isf- In a device for closing the openings of pipes against an escape of sewer-gas, the hollow capformed of elastic material, or with a hear- -ing-surlace of elastic material that will couform to the surface against which it is to bear, and provided with a hook secured to its crown tohold said cap against its hearing-surface to form an air-tight joint, as and for the purpose set forth.

In testimony that I claim the foregoing as' my own I affix my signature in presence ot' two witnesses. r" fr' @HAS E. DE VALIN.

Witnesses:

W. S. LnvnNs, l .J As. K. FRANKLIN. 

